Definitions /Dictionary/Glossary - nptel

Cure Cycle: The time/temperature/pressure cycle used to cure a thermosetting resin system or
prepreg
Cure Temperature: Temperature at which a cast, molded, or extruded product, resinimpregnated
reinforcement, adhesive or other material is subjected to curing.
Cure Time: The time required for liquid resin to reach a cured or fully polymerized state after
catalyst has been added.
Curing Agent: A catalytic or reactive agent that, when added to a resin, causes polymerization.
It is also called hardener.
Cut Ends on Doff: Severed ends generally caused by abrasion during shipping or by careless
use of a knife when the package is removed from the pallet.
Cycle: The complete, repeating sequence of operations in a process or part of a process. In
molding, cycle time is the period (or elapsed time) between a certain point in one cycle and the
same point in the next.
DAP: Diallyl Phthalate (Thermoset Resin).
Damping: The decay with time of the amplitude of free vibrations of a specimen.
Daylight: The distance, in the open position, between the moving and fixed tables or the platens
of a hydraulic press. In a multi-platen press, daylight is the distance between adjacent platens.
Daylight provides space so a molded part can be removed from the mold.
Deep-Draw Mold: A mold whose core is long in relation to its wall thickness.
Deflashing: A finishing technique used to remove excess, unwanted material (flashing) on a
plastic molding.
Deflection Temperature under Load: Temperature at which a simple beam has deflected a
given amount under load (formerly called heat distortion temperature).
Deformation Under Load: Dimensional change of a material under load for a specific time
following the instantaneous elastic deformation caused by the initial application of the load
(Also, 'cold flow' or 'creep') .
Delamination: Separation of composite layers, either local or covering a wide area. It can occur
in the cure or subsequent life.
Denier: A direct numbering system for expressing linear density, equal to mass in grams per
9000m of yarn, filament, fiber, or other textile strand.